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# -*- coding: utf-8 -*-
# Authors: Alex Rockhill <aprockhill@mailbox.org>
#
# License: BSD-3-clause
import os.path as op
import numpy as np
from numpy.testing import assert_allclose
import pytest
from mne.datasets import testing
from mne.utils import requires_nibabel, catch_logging, use_log_level
from mne.viz.utils import _fake_click
data_path = testing.data_path(download=False)
subject = 'sample'
subjects_dir = op.join(data_path, 'subjects')
@pytest.fixture
def _slice_browser(renderer_interactive_pyvistaqt):
from qtpy.QtWidgets import QApplication
from mne.gui._core import SliceBrowser
app = QApplication.instance()
if app is None:
app = QApplication(["Slice Browser"])
# Use a fixture to create these classes so we can ensure that they
# are closed at the end of the test
guis = list()
def fun(*args, **kwargs):
guis.append(SliceBrowser(*args, **kwargs))
return guis[-1]
yield fun
for gui in guis:
try:
gui.close()
except Exception:
pass
@requires_nibabel()
@testing.requires_testing_data
def test_slice_browser_io(_slice_browser):
"""Test the input/output of the slice browser GUI."""
import nibabel as nib
with pytest.raises(ValueError, match='Base image is not aligned to MRI'):
_slice_browser(nib.MGHImage(
np.ones((96, 96, 96), dtype=np.float32), np.eye(4)),
subject=subject, subjects_dir=subjects_dir)
@testing.requires_testing_data
def test_slice_browser_display(_slice_browser):
"""Test that the slice browser GUI displays properly."""
# test no seghead, fsaverage doesn't have seghead
with pytest.warns(RuntimeWarning, match='`seghead` not found'):
with catch_logging() as log:
_slice_browser(subject='fsaverage', subjects_dir=subjects_dir,
verbose=True)
log = log.getvalue()
assert 'using marching cubes' in log
# test functions
with pytest.warns(RuntimeWarning, match='`pial` surface not found'):
gui = _slice_browser(subject=subject, subjects_dir=subjects_dir)
# test RAS
gui._RAS_textbox.setPlainText('10 10 10\n')
assert_allclose(gui._ras, [10, 10, 10])
# test vox
gui._VOX_textbox.setPlainText('150, 150, 150\n')
assert_allclose(gui._ras, [23, 22, 23])
# test click
with use_log_level('debug'):
_fake_click(gui._figs[2], gui._figs[2].axes[0],
[137, 140], xform='data', kind='release')
assert_allclose(gui._ras, [10, 12, 23])
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